Metal lath.



G. H. SCAMMELL.

METAL LATH.

APPLICATION FILED NOV. 27, 19m.

Patented J an. 2, 1917.

SCAMMELL, OF NEW YORK, N. Y; ASSIGNOIR, TO CHARLES H., SCAMMELL COMPANY, A CORPORATION OF NEW JERSEY.

CHARLES H.

METAL LATH.

Specification of Letters Patent.

8 Patented J an. 2, 191?.

Application filed November 27, 1914. Serial No. 874,162.

To all whom it may concern:

Be it known that I, CHARLES MELL, a citizen of the United States, residing at New York, county of New York, and

the followingspecification and the accompanying drawings, forming a part. of the same. 1

This invention relates to metal lath formed of sheets of perforated -metal or wire netting, the especial object being to provide a cheap and efiicient article of that class of plastering materials in which the lath carries a backing sheet, preferably of paper, against which plaster or other plastic material may be molded and the desired clench of the plaster secured with a comaratively small amount of plaster.

The invention includes, however, constructions in which backing sheets are used on both sides of the metal lath for sheathing and other purposes.

The invention is especially applicable in connection with that form of perforated metal lath now well known'as expanded metal, which is formed by slitting the metal sheet and drawingv or forcing out the strands to open .theslits and turn the strands at an angle to the planeof the metal, the joints between the strands thus forming portions projecting beyond the strands and engaging the backing sheet, as fully described and 5 shown in United States Letters Patent 'to Leist No. 1,061,389, dated May 13th, 1913.

In accordance with the present invention, I form the expanded metal with tongues'or points projecting beyond the strands, which 40 tongues or points are forced through the paper or other backing sheet and clenched thereon, so as to hold the sheet firmly and at frequent points. Thej tongues or points preferably are at the "strand joints of the 5 lath and may readily and cheaply be pro-- vided by so slitting the metal sheet to be ex-- panded that the metal is out along the lines of these tongues or points, so that in drawing or'forcing out the slit metal in expand- 0 ing, the/ turning of the strands results in turning "these tongues or points approximately at right angles to the sheet so as to project beyond the-p lane of the metal. The paper or other backing sheet may readily'be 5 applied by pressing the metal lath and back- H. SCAM State of New York, have invented certain new and useful Improvements in Metal Laths, fully described and represented in 5' of Fig. 3.' Fig. 6 is a plan of a 'poitio of ing sheet together and clenching the ends of the tongues or points upon the sheet, as by passing the lath and backing sheet together between metal rolls, either during or after the expanding of the slit metal. If sheets are to be applied onboth sides of the metal thismay be done in the same manner at a single operation, orotherwise, as desired.

I In the accompanying drawings forming a part of this specification, the invention is illustrated as applied in the best form now known to me in connection-with a preferred form of expanded metal lath, and this construction will now be described in detail and the features forming the invention then particularly pointed out in the claims? In thedrawingsz Figure 1 is a plan View are sections, respectively, on the lineaf r s the slit metal sheet before e p i 7 to 10- illustrate the application of backing...

sheets on each side of the metal. "Fig. '7 is view similar toFig. 6 showing the slit metal. Fig.8 is a view similar to Fig. 3 showing the metal Fig. 7 expanded. Fig. 9 is a section on the line 9 of Fig. 8. Fig. 10 is'a view similar to Fig. 2, showing the complete article.

Referring to the drawings, and particularly to Figs. 1 to 6, A is the expanded'metal lath, and B the backing sheet, preferably of paper, secured thereon by the tongues or. points 1, forme 'on the metal and projecting beyond the plane thereof, these tongues or pointspassing through the paper sheet B and being clenched on the outer side of the paper, as shown clearly in Fig.2. The ex-' panded metal is-of a well known form and preferably is made by the methods and ma- ,chines fully shown and described in United States patents to Wendell No. 885,815, dated April 28th, 1908, and No. 900,902, dated October 13th, 1908, but it will be understood that other methods and machines may be used for producing the article. In this preferred method, the metal sheet C is slit in the manner shown in Fig. 6, the usual slits 2 having portions 3 forming the tongues 1 and the stretchwith corresponding notches,

down of the ing of the metal and turning ing sheets on both strands, turns these tongues approximately at right angles to the plane of the metal, so that they extend beyond the strand joints, and they preferably are made of such length as to extend through the paper backing sheet and be clenched upon it, as shown in Fig. 2.

As illustrated in Figs. 1 to 6 and above described, the invention isapplied in connection With plastering material or other articles, having a backing sheet only on one side of the metal lath. The invention may be applied also, in producing similar material for sheathing or other purposes having backsides of the metal lath. Such aconstruction and method of producing it is illustrated in Figs. 7 to 10. In this construction the sheet metal C. is

.slit so as to form tWo sets of tongues or points, one set'l extending in one direction, and the other set '1 extending in the opposite direction, so that the stretching of the metal for expanding results in the tongues 1 projecting from one side of the article of this expanded metal, and the tongues 1 project-- ing from the opposite side of the metal and backing sheets B B may be applied on opposite sides of the metal and held in the I same manner as previously described. The

relative arrangement and method of producing the opposite tongues 1 and 1 in slitting the metal may be varied. As shown in Fig. 7, alternate rows of tongues extend in opposite directions, producing the metal of Figs. 8 and 9 after expanding, and Fig. 10 shows the complete article With backing sheets applied to the metal of Figs. 8 and 9.

The invention provides a complete article consisting of metal lath with a backing sheet on one or both sides in Which the paper or other backing sheet may be held at such frequent points and so 'firmly as to provide an class Which is most efficient in use, and economical and satisfactory'in manufacture, handling and shipment.

While the invention has been illustrated only in connection With that form of metal lath known as expanded metal, and the preferred form of expanded metal, it Will be understood that the invention, broadly considered, is applicable generally in connection with metal lath, either of the. sheet metal or Woven or netted Wire classes, and

With such other forms of metal lath the projecting tongues or points by Which the backing sheet is secured may be formed on the metal and clenched upon or otherwise of metal lath having projecting tongues formed thereon, and a backing sheet secured on the lath by said projecting tongues clenched upon the sheet.

3. An article of manufacture consisting of expanded metal lath having its strands turned at an angle to the plane of the metal and tongues formed on the metal and projecting beyond the plane of the strand joints of the lath, and a backing sheet secured on the lath by said tongues clenched upon the sheet.

4. An article of manufacture consisting of plastering material formed of metal lath adapted to receive and hold plaster or similar-plastic material and having projecting tongues formed thereon, and a backing sheet of paper or similar material secured by said projecting tongues on one side of the lath and adapted to form a mold sheet for the plaster applied to the lath.

5. An article of manufacture consisting of plastering material formed of expandedmetal lath adapted to receive and hold plaster CHARLES H. SOAMMELL.

Witnesses:

A. WHITE, 0. J. SAWYER. 

